Black things that extend from the rock.

[flotation]

These little black nubs can extend out from the rock during daylight hours and have several small tentacles on the end. I couldn't get a photo of them extended because the rock is in a glass of water because it also has an aiptasia on it, which I removed, and now they're not extending.

Any ideas of what they might be?

 

[KING KONG]

These little black nubs can extend out from the rock during daylight hours and have several small tentacles on the end. I couldn't get a photo of them extended because the rock is in a glass of water because it also has an aiptasia on it, which I removed, and now they're not extending.

Any ideas of what they might be?

I also have them on a rock don't know what they are but I think that thing is not aiptasia. I never seen mine moving or multiplying

 

[ISpeakForTheSeas]

I think you may need some closer up, clear photos for an ID here.

 

[flotation]

I also have them on a rock don't know what they are but I think that thing is not aiptasia. I never seen mine moving or multiplying

Thanks! There was an aiptasia on this rock, so I'm not keen to put it back in the aquarium just to see what happens.

 

[1epauletteshark]

Sounds a bit like a micro brittle star no?